Heat conserving device



Jan. 10, 1939. F. L. LADE 2,143,354

' HEAT GONSERVING DEVICE Filed March 1, 1938 Patented Jan. 10, 1939 UNITED STATES HEAT CONSERVING DEVICE Frederick Leonard Lade, Vancouver, British Columbia, Canada Application March 1, 1938, Serial No. 193,309 In Canada March 8, 1937 1 Claim.

My invention relates to improvements in heat conserving devices for hot water boilers and the like. The object of the invention is to provide means capable of installation in the flues of a 5 sectional or other boilers which will elongate the gas travel through said flues by deflecting the gases alternately from one side of the flue to the other and impinge upon the flue walls so that the heat of the gases will be transferred to the water or steam spaces with a minimum of loss. A further object is to provide means whereby the gas travel may be varied, so that satisfactory draught conditions through the flues may be .maintained irrespective of the draught pull on 15 the stack.

The invention consists essentially of a plurality of hingedly mounted deflectors arranged in one or more of the flues, which deflectors are staggered throughout the length of the flue and are coupled together whereby their angle to the walls of the flue may be adjusted as desired, as will be more fully described in the following specification and shown in the accompanying drawing, in which:-

25 Fig. 1 is a fractional front elevational view of the front of a sectional boiler fitted with the invention.

Fig. 2 is a sectional plan view of the boiler taken on the line 2-2 of Figure 1.

30 Fig. 3 is a longitudinal sectional View taken on the line 3-3 of Figure 1;

Fig, 4 is a general View of a portion of one of the deflector frames.

Figs. 5 and 6 are detail views showing the 35 preferred pivotal mounting of the deflector plates.

In the drawing like characters of reference indicate corresponding parts in each figure.

The numeral l indicates a sectional boiler 40 having a fire box 2, side flues 3 and a center flue 4. The flues 3 and 4 are connected together by a transverse passage 5 which is provided with clean out doors 6, one only of which is shown in Figure 1. The side flues 3 in the instance shown,

:5 communicate between the fire box 2 through vertical passages I, and the center flue 4 communicates with a breeching 8 through an opening 9.

Mounted in each of the flues 3 and 4 is a frame It, see Figure 4, which consists prefer- 50 ably of longitudinal members II which connect at each end with a rectangular end member [2. The frame H1 is also provided along its longitudinal center with a bottom rib l3 and a top rib l4 and between these ribs a plurality of deflectors 55 I5 are mounted, which deflectors may be of any shape required to suit the cross section of the flue into which the device is fitted. Each deflector is pivotally connected to the bottom rib as at l6 and is provided at its upper edge with a pivot pin l1 and a crank pin [8, see Figures 4 and 5. The top rib- I4 is alternately provided with short transverse slots IS on its opposite sides and complementary to each transverse slot 5 is a longitudinal slot 20. Slidably mounted parallel to the top rib I4 is a rod 2i which is apertured along its length as at 22 to receive the crank pin l8 of each deflector l5 operated thereby and each crank pin extends upwardly through 10 a corresponding slot 20 in the top rib, each pivot pin l'l passes upwardly into a corresponding transverse slot IS in which the upper part of the deflector is fulcrumed. The rods 2| of the several frames [0 are suitably coupled together, preferably within the transverse passage 5, the center rod being extended at the meeting line of the doors 6 as at 23. The rod extension 23 is preferably connected through a rocking arm 24 to a suitable electrically or thermostatically operated controller 25, or if manual control is to be relied upon, the rocking arm 24 could serve as a hand lever.

The deflectors would normally be arranged to lie in vertical planes transverse to the length 25 of the flues as shown in the upper half of Figure 2. If the stack pull is low so that too much resistance is imposed by the deflectors to efflcient gas travel, the rod extension 23 is moved endwise to swing the deflectors collectively to a suitable angle from their original position as shown in the lower half of Figure 2. Obviously with deflectors disposed to intersect the flues in the manner shown, the gas travel will be elongated and with the adjustment provided the elongation may be varied to suit any firing condition with the result that stack temperature will be reduced and fuel economy will be obtained.

What I claim as my invention is:

A heating conserving device for hot water boilers and the like comprising a supporting frame having upper and lower longitudinal members,

a plurality of deflectors having pivot pins mounted in said members, said deflectors being alternately mounted to swing on opposite sides of the members, a crank pin to each of the deflectors, a rod extending along one of said members having apertures intermediate its length to engage the several crank pins whereby the longitudinal movement of the rod rocks the deflectors about their pivot pins, one of said longitudinal members having a longitudinal slot to receive the pivot pin of a deflector and an adjacent transverse slot to receive the crank pin of said deflector.

FREDERICK LEONARD LADE. 

